49405644636 has 12 divisors (see below), whose sum is σ = 115279837512. Its totient is φ = 16468548208.

The previous prime is 49405644623. The next prime is 49405644637. The reversal of 49405644636 is 63644650494.

49405644636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49405644637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2058568515 + ... + 2058568538.

It is an arithmetic number, because the mean of its divisors is an integer number (9606653126).

Almost surely, 2^49405644636 is an apocalyptic number.

It is an amenable number.

49405644636 is an abundant number, since it is smaller than the sum of its proper divisors (65874192876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49405644636 is a wasteful number, since it uses less digits than its factorization.

49405644636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117137060 (or 4117137058 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 49405644636 in words is "forty-nine billion, four hundred five million, six hundred forty-four thousand, six hundred thirty-six".